Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 769 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — acid and base, indicator colours, chemical change, what seeds and yeast need, transpiration, crystals or filtering. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it turns blue (b) it grows faster (c) it flowers more (d) it wilts and droops
2. 2.True or false: a funnel or spoon is needed for the fizzy balloon. (a) True (b) False
3. 3.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) veins (b) stomata (c) petals (d) roots
4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the number of drops (c) the turmeric paper (d) the colour we see
5. 5.🛟 Why should you never drink water just because it looks clear? (a) germs are invisible (b) clear water is hot (c) clear water is salty (d) clear water is sweet
6. 6.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) browning lemon ink (c) rusting iron (d) baking a cake
7. 7.True or false: a bowl is needed for making butter. (a) True (b) False
8. 8.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) milk turning to curd (d) freezing water
9. 9.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) a mirror (c) a funnel or spoon (d) baking soda
10. 10.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) both stay behind (b) leaves pass through (c) leaves stay behind (d) tea stays behind
11. 11.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) ironing the paper (c) reading the message (d) letting the paper dry
12. 12.True or false: wet seeds by a window sprouts in a few days. (a) False (b) True
13. 13.🧺 Do we need a balloon for sprouting seeds? (a) not needed (b) needed
14. 14.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) dark green (b) blue (c) bright red (d) pale yellow
15. 15.True or false: vinegar is a base. (a) True (b) False
16. 16.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) carbon dioxide (b) oxygen (c) hydrogen (d) helium
17. 17.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) bright blue (d) reddish
18. 18.🔍 Which is the odd one out? (a) plain water (b) salt water (c) sugar water (d) lemon juice
19. 19.True or false: a battery cell is not needed for the leafy bag test. (a) False (b) True
20. 20.🧺 Which of these is needed for the muddy water filter? (a) turmeric powder (b) a magnet (c) a mirror (d) a funnel
21. 21.🍋 Which of these steps is a job a child can do? (a) cutting the lemon (b) writing the message (c) plugging in the iron (d) ironing the paper
22. 22.🧺 Which of these is needed for making butter? (a) a bowl (b) yeast (c) a balloon (d) a magnet
23. 23.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
24. 24.🫗 Which of these is done by winnowing? (a) tea leaves from tea (b) chaff from wheat grain (c) bad grains from rice (d) small stones from dal
25. 25.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
26. 26.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) sunlight (c) a potted plant (d) vinegar
27. 27.🍞 Which of these is something yeast needs? (a) time (b) sunlight (c) a magnet (d) vinegar
28. 28.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a balloon (c) white paper strips (d) turmeric powder
29. 29.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) ice cold (d) warm, not hot
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the amount of water (c) size of the balloon (d) the amount of sugar
31. 31.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) cooking an egg (d) freezing water
32. 32.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) writing the message (b) letting the paper dry (c) ironing the paper (d) dipping the cotton bud
34. 34.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we measure it (b) we keep it the same (c) we change it
35. 35.🧂 Which of these dissolves in water? (a) small pebbles (b) sand (c) food colour (d) cooking oil
36. 36.🔍 Which is the odd one out? (a) time (b) sugar (c) a magnet (d) warm water
37. 37.True or false: a balloon is not needed for making butter. (a) True (b) False
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) True (b) False
39. 39.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) dissolving salt (c) melting ice (d) cooking an egg
40. 40.True or false: lemon juice is needed for the turmeric test. (a) False (b) True

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